Multiple field magnet ignition magneto



2 Sheets-Sheet 1 J. BERNARD f/gz/ Filed June 29, 1940 lllll! MULTIPLE FIELD MAGNET IGNITION MAGNETO m W Q MM w m li I.. M@ .m J HM 1/7 HM HM/ M .Ilm Uhm In l f w /|L|M l/ if L L-; k mn H V o EW WN W/v/ \\l\ .1% MW Lm f ,1/ VM///// 3 0U 3 my m Aug. 3], 1943.

J. BERNARD Aug. 31, 1943.

' MULTIPLE FIELD MAGNET IGNITION MAGNETO 2 Sheets-Sheet 2 Filed June 29, 1940 Patented Aug. 31, 1943 MULTIPLE FIELD MAGNET IGNITION MAGNETO Jean Bernard, Paris, France; vested in the Allen Property Oustcdian v Application June 29, 1940,' Serial No` 343,284

. In France July 4, 1939 (C'l. ril- 209) 7 Claims.

The present invention has for its object an ignition magneto in which a plurality of flux distributors are mechanically assembled together to form a unit which rotates as a whole about its axis, each flux distributor retaining its magnetic independence andV co-operating with at least one armature system that belongs to it.

This particular unit therefore enables a plurality of spark trains to be generated, the sparks of a train being located in time, relatively to those of the other trains, according to the relative angular position at the same instant of each ux distributor relatively to its own armature system. If, at a given instant, said position is the same, the sparks are simultaneous; in the opposite case, the spark trains are displaced relatively to the others.

Consequently, an important object of my invention is to provide a magneto having a multiple flux distributor composed of distributors which are angularly set relatively to each other at a predetermined angle, or again of having its armature poles set at a different angle relatively to a common origin from one armature to the other, or` again of having both these peculiarities simultaneously. Preferably, the means for fixing the flux distributors are so kchosen that they permit of a variable setting, of said magnets, the required adjusting being accurately effected when assembling. It is thus possible to construct, with identical parts, magnetos in which the various spark trains are generated in time, either simultaneously, or with any desired difference.

Magnetos according to the invention may be constructed in any manner which is customary in this branch of the art and it is solely by way of a non-limitative example that a particular embodiment in the case of two armatures and a ilux distributor unit including two magnets, has been shown diagrammatically in the accompanying drawings.

In said drawings:

Fig. l is a section through the axis of the flux distributor including two magnets,

Fig, 2 is a transverse section along the line II--II of Fig. 1, and

Fig. 3 shows a modication of Fig. 2.

In the exemplary embodiment shown in the Figs. 1 and 2, only the flux distributor and the two armatures have been shown, it being possible ior the other members, such as distributors, contact-breakers, etc., to be arranged in any known manner. The flux distributor has been shown as including two magnets I and 2, in this case spider-shaped magnets with.. four poles,v

which are surrounded by frames l and 4 oi.' non-- rmagnetic: metal andare provided "with `central holes 6, 1. The frames l and lare bored concentrally toy the said holes 6, l but to a smaller diameter and the two magnets are mounted on f In order to permit of a variable relative settinl.

a ring of n holes may be provided yin vone frame and a ring of p holes in the other.

This flux distributor cooperates with two inu dependent armatures comprising n xed laminations I3, I4 and coils I5, I6. `The axes` of said coils are in this case spaced at around the rotor axis and perpendicular to the same plane whichpasses through said axis. l

In the modification vshown in Fig. 3, .each of `the two magnets I and 2 isv associated with trim'.`

independent armatures `comprising `iixed lamina- I5-I5 and lli-46'. The ignition coilsA associated with the two flux distributors are in'.v ranged in front of each other togeneratt H1114 tion sparks in trains which are timely'separatcd according with the-angular setting of thel mag nets I and 2. The other parts are similar tothe Pig; 2' and indl one described with reference to cated by the same reference characters.

` While I have described what! at present con-V sider preferred embodimentsoi' myinvention. it

will be obvious to those skilled in the' art, that various changes and modiiicationsmay be made without departing from my invention. Thus, `in particular, the flux distributors may have any number of poles (two, four. six, eight or more), the flux distributors may not be formed by magnets, the coils may be arranged differently about the field magnet. I therefore aim in the appended claims tor cover all such changes rand j modifications as fall within the true spirit scope of my invention.

What I claim is: c 1. In an ignition magneto for internal combustion engine, a rotating shaft, at least two and flux distributors supported by said shaft and spaced along said shaft, at least one xed armature associated with each of said flux distributors, whereby forming at least two ignition current generators, said generators being set at an angular distance relatively to each other coaxially with said shaft in order to obtain an angular and time separation of the spark trains produced by the respective generators.

2. In an ignition magneto for internal combustion engine, a rotat-ing shaft, at least two inductors supported by said shaft, and spaced both along said shaft and angularly around said shaft, a magnet included in each inductor, at least one armature associated with each inductor whereby forming at least two ignition current generators, said generators producing spark trains separated angularly and timely,

3. In an ignition magneto for internal combustion engine, a rotating shaft, at least two magnets supported by said shaft and spaced both along said shaft and angularly around said shaft, means for keying one of said magnets on said shaft, means for xing the other magnet with reference to the first one and at least one armature associated with each magnet whereby forming two ignition current generators producing angularly and timely separated spark trains.

4. In an ignition magneto for internal combustion engine, a rotating shaft, at least two similar flux distributors carried by said shaft, said flux distributors being both spaced along said shaft and angularly about said shaft, a stationary amature system associated with each of said fiux distributors respectively and including at least one coil, the coils of the armatures being identical and having their axes parallel to each other.

5. In an ignition magneto for internal combustion engine, a rotating shaft, at least two manets supported by said `shaft and spaced both along said shaft and angularly around said shaft, means for keying one of said magnets on said shaft, means for fixing the other magnet with reference to the first one, adjusting means associated with said last named means to permit an angular setting of one magnet with reference to the other and armature systems associated with said magnets to produce angularly and timely separated spark trains.

6. In an ignition magneto for multi-cylinder internal combustion engine including a rotating shaft, at least two co-axial iiux distributors supported by said shaft and spaced along said shaft, and a corresponding member of independent and separated armature systems which are each aasociad with one flux distributor, at least two independent angularly spaced ignition amature coils included in each of said armature systems which are mounted with reference to the fiux distributors to generate ignition sparks in trains which are timely separated in accordance with the required distributori of the explosions in the engine.

7. An ignition magneto for multi-cylinder internal combustion engine including a rotating shaft, two co-axial flux distributors supported by said shaft and spaced both along said shaft and angularly around said shaft, at least two independent angularly spaced ignition amature coils associated with each flux distributor, the coils associated with the two flux distributors being arranged in front of each other to generate ignition sparks in trains which are timely separated according to the relative angular setting of the nux distributors.

JEAN BERNARD. 

